diff --git a/odoo_scripts/docker_build.py b/odoo_scripts/docker_build.py
index 773727e69cf44f30c86e2c80fe2dfb052bd17115_b2Rvb19zY3JpcHRzL2RvY2tlcl9idWlsZC5weQ==..1a1ab90b9b89e1ca42282eafb23d5e5a150455c9_b2Rvb19zY3JpcHRzL2RvY2tlcl9idWlsZC5weQ== 100644
--- a/odoo_scripts/docker_build.py
+++ b/odoo_scripts/docker_build.py
@@ -12,7 +12,7 @@
 
 from python_on_whales import docker
 
-from .config import ODOO_7, ODOO_8, ODOO_10, ODOO_11, ODOO_13, ODOO_14, ODOO_15, Config
+from .config import ODOO_7, ODOO_8, ODOO_10, ODOO_11, ODOO_13, ODOO_14, Config
 from .docker_build_clean import clean
 from .docker_build_copy import Configuration as CopyConfiguration
 from .docker_build_copy import add_build_copy_options, copy, get_build_copy_options
@@ -193,7 +193,7 @@
         call(["cp", dockerfile, debug_dockerfile])
 
         with open(debug_dockerfile, "a") as myfile:
-            myfile.write("\n# Developer helpers\n")
+            myfile.write("\n# Developer helpers\nENV PIP_CACHE_DIR=/var/cache/pip\n")
             if odoo_type in (
                 ODOO_7,
                 ODOO_8,
@@ -201,7 +201,6 @@
                 ODOO_11,
                 ODOO_13,
                 ODOO_14,
-                ODOO_15,
             ):
                 myfile.write("USER root\nRUN apt-get update -qq\n")
                 myfile.write(
@@ -205,5 +204,6 @@
             ):
                 myfile.write("USER root\nRUN apt-get update -qq\n")
                 myfile.write(
-                    "RUN DEBIAN_FRONTEND=noninteractive apt-get install -y -qq "
+                    "RUN --mount=target=/var/cache/apt,type=cache,sharing=shared "
+                    "DEBIAN_FRONTEND=noninteractive apt-get install -y -qq "
                 )
@@ -209,8 +209,8 @@
                 )
-            if odoo_type in (ODOO_11, ODOO_13, ODOO_14, ODOO_15):
+            if odoo_type in (ODOO_11, ODOO_13, ODOO_14):
                 myfile.write(
                     "python3-watchdog python3-ipdb python3-pyinotify python3-wheel\n"
                 )
                 # newer setuptools_scm>6 is not compatible with python 3.5 due
                 # to the use of f-strings
                 myfile.write(
@@ -211,10 +211,11 @@
                 myfile.write(
                     "python3-watchdog python3-ipdb python3-pyinotify python3-wheel\n"
                 )
                 # newer setuptools_scm>6 is not compatible with python 3.5 due
                 # to the use of f-strings
                 myfile.write(
-                    "RUN python3 -m pip install "
+                    "RUN --mount=target=/var/cache/pip,type=cache,sharing=shared "
+                    "python3 -m pip install "
                     "\"setuptools_scm<6;python_version<='3.5'\"\n"
                 )
                 # Install pdb++
@@ -218,8 +219,11 @@
                     "\"setuptools_scm<6;python_version<='3.5'\"\n"
                 )
                 # Install pdb++
-                myfile.write("RUN python3 -m pip install pdbpp\n")
+                myfile.write(
+                    "RUN --mount=target=/var/cache/pip,type=cache,sharing=shared "
+                    "python3 -m pip install pdbpp\n"
+                )
                 myfile.write("USER odoo\n")
             elif odoo_type in (ODOO_10,):
                 myfile.write("python-ipdb\n")
                 myfile.write(
@@ -222,9 +226,10 @@
                 myfile.write("USER odoo\n")
             elif odoo_type in (ODOO_10,):
                 myfile.write("python-ipdb\n")
                 myfile.write(
-                    "RUN pip install watchdog --disable-pip-version-check "
+                    "RUN --mount=target=/var/cache/pip,type=cache,sharing=shared pip "
+                    "install watchdog --disable-pip-version-check "
                     "--system --only-binary wheel"
                 )
             elif odoo_type in (ODOO_7, ODOO_8):
                 myfile.write("python-ipdb\n")
@@ -227,7 +232,10 @@
                     "--system --only-binary wheel"
                 )
             elif odoo_type in (ODOO_7, ODOO_8):
                 myfile.write("python-ipdb\n")
-                myfile.write("RUN pip install pyinotify")
+                myfile.write(
+                    "RUN --mount=target=/var/cache/pip,type=cache,sharing=shared pip "
+                    "install pyinotify\n"
+                )
             else:
                 myfile.write(
@@ -232,6 +240,7 @@
             else:
                 myfile.write(
-                    "RUN python3 -m pip install pdbpp watchdog ipdb pyinotify\n"
+                    "RUN --mount=target=/var/cache/pip,type=cache,sharing=shared "
+                    "python3 -m pip install pdbpp watchdog ipdb pyinotify\n"
                 )
 
         dockerfile = debug_dockerfile